* Don't return true/false in validations (does nothing). * Prefer `errors[:base]` over `self.errors[:base]`. * Add antecedent_wiki / consequent_wiki associations. * Factor out antecedent_and_consequent_are_different validation.
* Don't return true/false in validations (does nothing). * Prefer `errors[:base]` over `self.errors[:base]`. * Add antecedent_wiki / consequent_wiki associations. * Factor out antecedent_and_consequent_are_different validation.